CVE-2026-31072

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-19. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The JSONSerializer and CBORSerializer in APScheduler (all versions including 3.10.x and 4.0.0a5) are vulnerable to Remote Code Execution (RCE) via Insecure Deserialization. The unmarshal_object function allows for arbitrary class instantiation and state injection by dynamically importing modules and calling __setstate__ on any class available in the Python environment. An attacker can exploit this by submitting a specially crafted JSON or CBOR payload to an application using these serializers

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
54%
KEV
Not listed

Published

May 19, 2026

Last Modified

July 24, 2026

Advisory Details (5)

Auto-updated Aug 21, 2026
Patch available. Sources: redhat.
redhat
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31072.json
generic

CVE-2026-31072 · GitHub

https://gist.github.com/nedlir/11fb77f35a59cbba73392a086b02a9c6
redhat

2479907 – (CVE-2026-31072) CVE-2026-31072 apscheduler: APScheduler: Remote Code Execution via Insecure Deserialization

https://bugzilla.redhat.com/show_bug.cgi?id=2479907
redhat Patch Available

CVE-2026-31072 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-31072
generic

GitHub - agronholm/apscheduler: Task scheduling library for Python · GitHub

https://github.com/agronholm/apscheduler

Vendor Advisories for CVE-2026-31072(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
pipapscheduler—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
apscheduler4.0.0a1 ... 4.0.0a6 (6 versions)——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 15× in last 7d / 117× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 345 total refreshes for this CVE.

  1. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-24 14:17 UTCEPSS rescore
  3. 2026-08-24 00:49 UTCGHSA enrichment
  4. 2026-08-23 20:53 UTCGHSA enrichment
  5. 2026-08-23 17:00 UTCEG score recompute
  6. 2026-08-23 17:00 UTCGHSA enrichment
  7. 2026-08-23 00:19 UTCEPSS rescore
  8. 2026-08-21 23:49 UTCEPSS rescore
  9. 2026-08-21 23:37 UTCEG score recompute
  10. 2026-08-21 23:37 UTCGHSA enrichment
  11. 2026-08-20 22:55 UTCEPSS rescore
  12. 2026-08-20 22:55 UTCEPSS rescore
  13. 2026-08-20 19:01 UTCEG score recompute
  14. 2026-08-20 19:01 UTCGHSA enrichment
  15. 2026-08-19 17:03 UTCEPSS rescore
  16. 2026-08-18 13:48 UTCEPSS rescore
  17. 2026-08-17 13:49 UTCEG score recompute
  18. 2026-08-17 13:49 UTCGHSA enrichment
  19. 2026-08-17 13:47 UTCEPSS rescore
  20. 2026-08-17 10:00 UTCGHSA enrichment
  21. 2026-08-16 16:59 UTCEG score recompute
  22. 2026-08-16 16:59 UTCGHSA enrichment
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 11:13 UTCGHSA enrichment
  25. 2026-08-16 07:24 UTCGHSA enrichment
Show 75 more
  1. 2026-08-16 03:34 UTCEG score recompute
  2. 2026-08-16 03:34 UTCGHSA enrichment
  3. 2026-08-16 02:14 UTCEPSS rescore
  4. 2026-08-15 01:39 UTCEG score recompute
  5. 2026-08-15 01:39 UTCGHSA enrichment
  6. 2026-08-15 01:30 UTCEPSS rescore
  7. 2026-08-14 21:49 UTCGHSA enrichment
  8. 2026-08-14 18:00 UTCGHSA enrichment
  9. 2026-08-14 13:35 UTCGHSA enrichment
  10. 2026-08-14 09:46 UTCGHSA enrichment
  11. 2026-08-14 05:56 UTCGHSA enrichment
  12. 2026-08-14 02:06 UTCEG score recompute
  13. 2026-08-14 02:06 UTCGHSA enrichment
  14. 2026-08-13 22:00 UTCEPSS rescore
  15. 2026-08-13 08:14 UTCGHSA enrichment
  16. 2026-08-13 03:18 UTCGHSA enrichment
  17. 2026-08-12 23:28 UTCGHSA enrichment
  18. 2026-08-12 19:39 UTCGHSA enrichment
  19. 2026-08-12 15:49 UTCEG score recompute
  20. 2026-08-12 15:49 UTCGHSA enrichment
  21. 2026-08-12 13:50 UTCEPSS rescore
  22. 2026-08-12 12:00 UTCGHSA enrichment
  23. 2026-08-11 22:37 UTCGHSA enrichment
  24. 2026-08-11 18:47 UTCGHSA enrichment
  25. 2026-08-11 13:53 UTCEG score recompute
  26. 2026-08-11 13:53 UTCGHSA enrichment
  27. 2026-08-11 08:17 UTCGHSA enrichment
  28. 2026-08-11 04:27 UTCGHSA enrichment
  29. 2026-08-11 00:38 UTCEG score recompute
  30. 2026-08-11 00:38 UTCGHSA enrichment
  31. 2026-08-11 00:00 UTCEPSS rescore
  32. 2026-08-10 12:08 UTCGHSA enrichment
  33. 2026-08-10 08:17 UTCGHSA enrichment
  34. 2026-08-10 04:27 UTCGHSA enrichment
  35. 2026-08-10 00:37 UTCGHSA enrichment
  36. 2026-08-09 20:47 UTCGHSA enrichment
  37. 2026-08-09 16:58 UTCEG score recompute
  38. 2026-08-09 16:58 UTCGHSA enrichment
  39. 2026-08-09 13:46 UTCEPSS rescore
  40. 2026-08-09 13:08 UTCGHSA enrichment
  41. 2026-08-09 09:18 UTCGHSA enrichment
  42. 2026-08-09 05:25 UTCGHSA enrichment
  43. 2026-08-09 01:35 UTCEG score recompute
  44. 2026-08-09 01:35 UTCGHSA enrichment
  45. 2026-08-08 16:37 UTCEPSS rescore
  46. 2026-08-08 12:53 UTCGHSA enrichment
  47. 2026-08-08 09:03 UTCGHSA enrichment
  48. 2026-08-08 05:13 UTCGHSA enrichment
  49. 2026-08-08 01:24 UTCGHSA enrichment
  50. 2026-08-07 21:34 UTCGHSA enrichment
  51. 2026-08-07 17:45 UTCEG score recompute
  52. 2026-08-07 17:45 UTCGHSA enrichment
  53. 2026-08-07 13:55 UTCGHSA enrichment
  54. 2026-08-07 10:05 UTCGHSA enrichment
  55. 2026-08-07 06:14 UTCGHSA enrichment
  56. 2026-08-07 01:09 UTCGHSA enrichment
  57. 2026-08-06 20:35 UTCGHSA enrichment
  58. 2026-08-06 16:45 UTCEG score recompute
  59. 2026-08-06 16:45 UTCGHSA enrichment
  60. 2026-08-06 13:46 UTCEPSS rescore
  61. 2026-08-06 12:39 UTCGHSA enrichment
  62. 2026-08-06 08:50 UTCGHSA enrichment
  63. 2026-08-06 05:00 UTCGHSA enrichment
  64. 2026-08-06 01:11 UTCGHSA enrichment
  65. 2026-08-05 21:21 UTCEG score recompute
  66. 2026-08-05 21:21 UTCGHSA enrichment
  67. 2026-08-05 19:17 UTCEPSS rescore
  68. 2026-08-04 15:10 UTCEPSS rescore
  69. 2026-08-04 10:38 UTCEPSS rescore
  70. 2026-08-04 04:27 UTCGHSA enrichment
  71. 2026-08-04 00:38 UTCGHSA enrichment
  72. 2026-08-03 20:48 UTCGHSA enrichment
  73. 2026-08-03 16:58 UTCEG score recompute
  74. 2026-08-03 16:58 UTCGHSA enrichment
  75. 2026-08-03 10:36 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-31072?
CVE-2026-31072 is a critical vulnerability published on May 19, 2026. The JSONSerializer and CBORSerializer in APScheduler (all versions including 3.10.x and 4.0.0a5) are vulnerable to Remote Code Execution (RCE) via Insecure Deserialization. The unmarshal_object function allows for arbitrary class instantiation and state injection by dynamically importing modules…
When was CVE-2026-31072 disclosed?
CVE-2026-31072 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31072 actively exploited?
CVE-2026-31072 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 45.8% of all scored CVEs.
What is the CVSS score of CVE-2026-31072?
CVE-2026-31072 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-31072?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31072, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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